Internship PPT final.pptx on ukai thermal power station

This presentation on ukai thermal power station

1. Summer Internship at Ukai Thermal Power Station Submitted By Sr No. Name Enrollment No. 1 Patel Abhay M. 200280109059 2 Kumbhar Sagar N. 200280109106 3 Mali Dashrath B. 200280109065 Submitted to. Mitul G. Patel

2. L.D. College of Engineering Two weeks internship at Ukai Thermal Power Station(UTPS) (A unit under G.S.E.C.L.)

3. INTRODUCTION Holding Company: Gujarat Uraja Vikas Nigam Limited (GUVNL) Generation Company: Gujarat State Electricity Corporation Limited (GSECL) Transmission Company: Gujarat Energy Transmission Corporation Limited (GETCO) Distribution Companies: Dakshin Gujarat Vij Company Limited (DGVCL) Uttar Gujarat Vij Company Limited ( U GVCL) Madhya Gujarat Vij Company Limited (MGVCL) Paschim Gujarat Vij Company Limited (PGVCL)

4. Ukai Thermal Power Station of the  GSECL, is a power station with an installed capacity of 1110 MW. It is one of  Gujarat's major coal-fired power plants, located on the bank of the  Tapi river because of water resources, along with hydroelectric power plant with the same name. It is coal based thermal power plant so water is essential thing for power generation. There are multiple plants with multiple capacity of generation . UKAI THERMAL POWER STATION Stage Number of unit Installed capacity(MW) Status Stage I 1 120 Retired from service Stage II 2 120 Retired from service Stage III 3 200 Running Stage IV 4 200 Running Stage V 5 210 Running Stage VI 6 500 Running

5. The coal extracted from the mines is brought to the UTPS through train. The coal is in imported from Bihar, Jharkhand (corba) and Maharashtra by train. In one train there is 55 to 60 wagon are there. COAL HANDLING PLANT

6. Tippler is motor driven assembly which unload the train wagon by rotating 180º The motor used in tippler is of 6.6 kv operated by operator when tipper hold the wagon . After the coal is unloaded form wagon it falls on Apron feeder. Apron feeder is a mechanism moving on the shafts and return Roller. It ca manage flow of stones , powder like coal. TRIPPLER

7. FLOW CHART OF COAL PLANT Conveyer belt Bunker Stacker cum reclaimer Coal Crusher Coal storage Ordinary coal Washed coal

8. As the name indicates boiler is use to boil water and turns into steam. There are various types of boilers based on fuel used in boiler. There is coal fire boiler, oil fire boiler, gas fire boiler etc . Boilers are classified in two types: Water tube boiler Fire tube boiler Boiler system: Economizer Super Heater Air Pre-Heater Condenser BOILER

9. There are three parts of turbine. High Pressure Turbine Intermediate Pressure Turbine Low P ressure Turbine TURBINE A steam turbine is mechanical device that extract thermal energy from pressurize steam and transforms it into mechanical energy, as the steam turbine generaterotary motion they are suited for driving electrical generators. The turbine shaft is connected to the generator shaft.

10. Steam inlet temperature is 540℃ and pressure is 130kg/cm^2. HIGH PRESSURE TURBINE Steam inlet temperature is 540℃ and pressure is 25kg/cm^2. INTERMIDATE PRESSURE TURBINE The steam in LP come from IP turbine with reduces pressure and temperature and goes to condenser. LOW PRESSURE TURBINE

11. GENERATOR Turbine shaft is connected with generator shaft hence it rotates the generator . Here in thermal power station ukai AC synchronous generator( turbo generator) is used which is Water and hydrogen cooled. Here generator is with capacity of 235300KVA in unit 3 & 4. Same as in unit 6 generator capacity is 588000KVA. Speed of both different capacity generator is 3000 RPM with a frequency of 50 Hz. Both are star-star connected generators.

12. For unit 3&4 PF: 0.85 Voltage: 15750 V Stator current: 8625 A Stator winding connection: 3 phase start-star Hydrogen pressure: 3.0kG/cm2 Turbo Genrator

13. For unit 6 PF : 0.85 Voltage: 21000 V Stator current: 16200 A CONNECTION: star-star COOLANT: Water and hydrogen Turbo Genrator (Unit 6)

14. MAIN OUTPUT SYSTEM After generation of electricity it is very important export or transmit it to the grid by switchyard. There for the transformers generating transformers are being used to step up the voltage. T here are different types of transformers on basis of ratings and function. Also for stepping up and stepping down transformer are being used to take power from the switch yard. Generator Transformer : GSECL, UTPS has 6 GTs of different MVA capacity. Unit produce 15.75kV the generator transformer steps up from 15.75kv to 220kV. In unit six generator output is 21kv so generator transformer steps up voltage from 21kv to 400kv.

15. Station Transformer : UTPS has 4 ST of different capacity. The function of station transformer is in emergency case or when station has to start the unit station transformer feed power to the auxiliaries from switchyard. Station transformer step down 220kV/7kV and makes two bus 6.6KvA and UAT is generally step 6.6kvB . HT motors operates on 6.6Kv. Unit Auxiliary Transformer : Step- down transformer. Which step down the voltage of ST from 6.6Kv to 415V. LT motors operates on 415V .

16. 220KV SWITCHYARD Switchyard is a switching station which is the main link between the generating plant and the transmission system. It can be considered as the heart of the power plant, the generated power will only be worthy if it can be transmitted and received by the consumers.

17. Components of switchyard Bus bar Bus coupler Lightning arrester Circuit breaker Isolator Current transformer Potential transformer Wave trap Or Power line communication Carrier(PLCC) Bus bar Lightning arrester Ckt breaker Isolator

18. Current Transformer Wave trap

19. ASH HANDLING PLANT Ash plant is very important section in station, Where two types of air collected . Fly Ash Bottom Ash There are two sides of ash control, fly ash control and bottom ash control. For bottom ash as well as fly ash SILO system is installed. There is ESP (Electrostatic precipitator). There are total 3 Nos of SILO, where 2 N os are for fly ash and 1 N os for bottom ash. The fly Ash is send to the cement and block producers by the truck. Bottom Ash is added with water to make the slurry form of Ash. Generally the ratio of water and bottom Ash is 3:1. Bottom Ash is stored in Ash pond which is located near the plant.

20. Electrical Grid

21. T h a n k y o u !